Phenyl-azo-phenyl compounds

ABSTRACT

5-ALKOXY-2-HALO-4NITROPHENYLAZO - 2&#39;&#39;- ACYLAMINO - 4&#39;&#39;(N,N-DIACLOXYALKYL) AMINOBENZENES ARE OF LOW SOLUBILITY IN WATER AND ARE HIGHLY SUITABLE FOR DYEING FIBRES AND TEXTILES CONSISTING OF HYDROPHOBIC SYNTHETIC OR SEMI-SYNTHETIC ORGANIC COMPOUNDS OF HIGH MOLECULAR WEIGHT.

United States Patent Office 3,632,801 Patented Jan. 4, 1972 3,632,801 PHENYL-AZO-PHENYL COMPOUNDS Wolfgang Groebke, Oberwil, Switzerland, assignor to US. Cl. 260-207 Claims ABSTRACT OF THE DISCLOSURE -alkoxy-2-halo-4-nitrophenylazo 2 acylamino 4- (N,N-diacyloxyalkyl)aminobenzenes are of low solubility in water and are highly suitable for dyeing fibres and textiles consisting of hydrophobic synthetic or semi-synthetic organic compounds of high molecular weight.

The new compounds are of the formula NH-C O-Rz where Hal stands for a chlorine or bromine atom,

R for a lower alkyl group,

R for a lower alkyl or alkoxy radical which may be substituted by chlorine or bromine atoms or by a hydroxyl or cyano group, or for a phenyl radical,

R for a lower alkylene radical, and

R for a lower alkyl or alkoxy radical which may be substituted by chlorine or bromine atoms or by hydroxyl or cyano groups.

The radicals denoted lower in these definitions bear 1 to 4 or, more particularly, 1 or 2 carbon atoms.

The compounds of the Formula I are produced by diazotization of an amine of formula and coupling of the resulting diazonium compound with a compound of formula NH O 0 Hz (III) The coupling reaction generally takes place in acid medium and with cooling, preferably at 05 C.; the medium may, if necessary, be buffered to about pH 4, eg with an alkali acetate.

A further process for the production ofthe dyes of Formula I consists in esterifying a compound of the formula IEIIaI O.N N=N.-N LR.OH I I 2 0R1 NHUORZ (Iv with an acid of the formula! n coorr (V) or a functional derivative of such an acid. Suitable functional acids are, e.g., the halides, in particular the bromides or chlorides, or the anhydrides.

It is desirable to convert the new dyes into dye preparations prior to application, employing for this purpose one of the normal methods, such :as grinding in the presence of dispersing agents and/ or fillers, with subsequent drying in a vacuum dried or atomizer. On the addition of a suitable amount of water the dyes can be applied to a substrate by an exhaustion dyeing, pad dyeing or printing process.

From aqueous dispersion the dyes build up well on fibres and textiles consisting of hydrophobic synthetic or semi-synthetic organic compounds of high molecular weight. They are especially suitable for the exhaustion dyeing, pad dyeing and printing of polyester, cellulose daicetate, cellulose triacetate and polyamide fibres. They are also dyeable on polyolefins, polyacrylonitrile and acrylonitrile copolymers, and polyvinyl compounds.

Known dyeing and priting methods are employed, for example that described in French Pat. 1,445,371.

The dyeings and prints obtained with these dyes have good all-round fastness, being particularly fast to thermofixation, sublimation, pleating, ozone and gas fumes. The wet fastness properties, including washing, Water and sea water fastness, are very good. Other notable features are the good light and cross dyeing fastness and migration power. The dyes are stable to the diiferent forms of permanent press finishing. They withstand boiling and reduction at temperatures up to about 220 C. and particularly up to 140 C., and show a wide range of acid and alkali stability. These stability properties are not adversely affected by the liquor ratio or by the presence of dyeing accelerants.

The parts given in Example 1 are by weight and the temperatures are in degrees centigrade.

EXAMPLE 1 At 7 parts of sodium nitrite are added to 155 parts of sulphuric acid, and subsequently at l520 parts of glacial acetic acid and 19.3 parts of 1-amino-2-chloro- 4-nitro-5-methoxybenzene are added. After 2 hours the diazonium salt solution thus formed is run into a solution of 33.6 parts of N,N-bis-(acetoxyethyl)-amino-3-propionylanilide and 5 parts of aminosulphonic acid in 60 parts of glacial acetic acid and 100 parts of ice-water. The coupling reaction is brought to a close by the addition of a 20% sodium acetate solution causing a shift of the pH value to 4. The dye formed is filtered oif with suction, washed free of acid and dried. It dyes polyester fibres in bright red shades which have very good fastness properties.

The table below specifies the substituents contained in further dyes of Formula I. These dyes can be produced in analogy with Example 1 and have fastness properties comparable to those of the dye there disclosed. On polyester fibres they give dyeings of red shade.

I CH3CH-CH3 Same as above -(CH2)2CH3 Same as above.

Representative dyestuffs of the foregoing examples are Example 26 as follows:

Example 1 O2N N=N-N(CH2CH2O 0 CH3); Cl 45 I OH; NH0 0 CH3 OzN-N=N N( 2CHnO 0 0 CH3): o-cfi ohm NHCOCzH;

5 0 01 Example 36 Example 2 Br I 02N- N=NN(CH2CH2O 0 0 o OHa) l O NN=N-C N(CHOH;O 0 0 CHa) 2 I 0 01m NBC 0 02115 F I 0 on NBC 0 02m Example 40 Example 3 Br o2N- N=N--N omomo 0 0 cum O N .N=N NICH2CHEOcm 041,115 I NHC 0 00H;

I 45 0 02115 NH0 0 02115 01 Example 01 Example 12 =N mwmcmoo 0 011 01120111); I O2N O N N C 2 z CO 02115 O C2115 NHGOOH:

| Having thus disclosed the invention what I claim is: 0 CH3 NH0 0 CHzOHzCl 1, A monoazo compound of the formula Example 14 Illa} c1 0 2N 3N=N N(RaO C O-R4) z OgN- -N=N-C -N cmomo c 0 omcmom R 1 I l 0 n, 1lNC 0-112 0 CH3 NBC 0 02H wherein Hal is a member selected from the group consisting of chloro and bromo;

R is lower alkyl;

R is phenyl or a substituted or unsubstituted member selected from the group consisting of lower alkyl and lower alkoxy; any substituent of a substituted member being selected from the group consisting of chloro, bromo, hydroxy and cyano;

R is lower alkylene; and

R is a substituted or unsubstituted member selected from the group consisting of lower alkyl and lower alkoxy; and substituent of a substituted member being selected from the group consisting of chloro, bromo, hydroxy and cyano.

2. The monoazo compound according to claim ll of the formula 00113 NHCOCzHa 3. The monoazo compound according to claim 1 of the formula OCHa NHCOCzH 4. The monoazo compound according to claim 1 of the formula 5. The monoazo compound according to claim 1 of the formula 0 CH3 NHC 0 0112011201 6. The monoazo compound according to claim 1 of the formula I OzN-C N=N--N(OH OHzO co ornament been uucooaru 7. The monoazo compound according to claim 1 of the formula 8. The monoazo compound according to claim 1 of the formula 9. The monoazo compound according to claim 1 of the formula OC2H NHCOCeH 10. The monoazo compound according to claim 1 of the formula CHARLES B. PARKER, Primary Examiner C. F. WARREN, Assistant Examiner US. Cl. X.R. 260--482 R, 575

223 3 UNITED STATES PATENT ormcr CERTIFICATE OF CQRRECTION- Patent No. 3,632,801 Dated January 4, 1972 lnventoflsb WOLFGANG GROEBKE It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1, line 43, "of formula" should read of the formula--; line 53,

"of formula" should read of the formula-; line 58, (after the formula) "(III)" should read (III) line 64, "I" should read --(I)-.. Column 2, line 5, (after the formula) "(IV" should read -(IV)-; line 26, "daicetate" should read --diacetate-; line 29, "priting" should read --printihg--; line 63, "1.." should read (I) Column 3, line 48, (in the formula) "OCH should read OCH "NHCOC H should read -NHCOC H line 55,

" should read -OCH NHCOC H should read (in the formula) "OCH 2 5 NHCOC H line 58, (in the formula) Br" should read Br k I Q line 62, (in the formula) "OC H should read -0C H "NI-ICOC H should read -NHCOC H line 69, (in the formula) "OCH should read -OCH NHCOCH CH Cl" should read --NHCOCH CH Cl; line 75, (in the formula) "OCH should read -OCH "NHCOC H should read NHCOC H Column 4, line 47,

CH /CH "0-CH should read O-CH "NHCOCH should read NHCOCH line CH CH 3 3 3 3 I l 54, (in the formula) "0C H should read OC H "NHCOC H should read 22212? UNITED STATES PATENT or CE EE'HFICATE m Patent No. 3,632,801 Dated January 1972 lnvent'ofls) WOLFGANG GRQEBKE It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

-NHCOC H line 58 (in the formula) "-N(CH CH OCOCH should read N(CH CH OCOCH line 60, (in the formula) "00 1-1 should read OC H, line 67, (in the formula) "OC H should read OC H "NHCOCH should read -NHCOCH Column 5, line 12, "and" should read -any--.

Signed and sealed this 13th day of March 1973.

(SEAL) Attest:

EDWARD M.PLETCHER,JR. ROBERT GOTTSCHALK Arresting Officer Commissioner of Patents 

